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How to recover biogas energy from wastewater

Supplier: CST Wastewater Solutions
03 May, 2010

A partnership of Australian and global leaders in environmental engineering is showing Australian food and beverage industries how to produce biogas from waste water, simultaneously enhancing energy recovery while reducing carbon footprints.

CST Wastewater Solutions is partnering with Global Water Engineering (GWE) to provide an extended wastewater treatment systems, such as the one being installed for Pacific Beverages' new Bluetongue brewery being completed in New South Wales this year.

The anerobic technology employed – a type that produces 10 per cent less sludge than aerobic types – is being incorporated into the $120 million state-of-the-art brewery that will eventually have an annual capacity of 150 million litres, making it the state's second largest. Pacific Beverages – a joint venture by Coca- Cola Amatil and global brewer SAB Miller – has ensured the brewery will boast strict environmental standards and world-class water and energy savings.

The ongoing CST/GWE partnership, operating throughout Australasia, is delivering and installing a treatment system with best-practice water reuse standards, while at the same time providing renewable energy, reducing its dependence on fossil fuels.

Wastewater will pass several pre-treatment steps before entering a GWE ANUBIX-B anaerobic methane reactor in which the wastewater’s organic content (COD) is digested by bacteria in a closed reactor, degrading the compounds and converting them into valuable biogas and cleaned effluent.

Biogas from the process will be collected and reused as renewable energy to power the brewery's boiler.

Treated effluent will then continue to an aerobic post-treatment stage in which organic content is further reduced by GWE’s proprietary MEMBROX Membrane Biological Reactor (MBR) system.

In the water polishing step, the water from the MBR unit is sent through a Reverse Osmosis (RO) installation. Finally the effluent is led to a disinfection and storage unit, where the recycled water is kept for reuse applications.

The partnership of GWE and CST Wastewater Solutions provides Australasia and the Asia-Pacific with a track record of more than 20 years hands-on experience in the region powerfully complemented by global leadership in food and beverage technologies. With more than 300 successfully completed projects in more than 50 countries, GWE is one of the market leaders for anaerobic wastewater treatment and for the transition of biosolids into green energy.

CST Wastewater Solutions is an Australian company formed more than 20 years ago to supply the industrial and municipal wastewater markets. Its technologies have been adopted throughout Australia and internationally, particularly into Asia and China.